TOOGOO(R) Diatonic Harmonica 10 Holes Blues Harp Mouth Organ Key of C Reed Instrument with Case Kid Musical Toy Pink 10-hole harmonica, key of C. Little in size and light in weight, great for both kids and adults. Reed and plate are made of aluminum, come out with a pretty good sound. Comes with a case keep harmonica safe. Good choice of gift-giving or little gadget for killing time.